Will the wife and daughters be held accountable if the husband provides for them from money that is likely to be unlawful, given the wife's fear of confronting him?

If the husband's entire wealth is illicit, it is not permissible to deal with him concerning it except in case of necessity. However, if his wealth is mixed with both lawful and unlawful, then dealing with him is permissible. The wife should advise her husband with wisdom and good counsel if she has a doubt based on facts regarding the source of his wealth.